ORIGINAL: Straightarrow
This sure would explain why I see so many 70 lb compounds shooting light arrows that barely penetrate whitetails on TV shows. It also helps explain why a guy shooting a 35 lb longbow with a 650 gr arrow, can have all passthroughs on the 17 whitetails he shot at in one year.
I believe the reason you see so many not penetrate on tv is because of piss poor broadhead choices.Plain and simple.I watched a double bull video the other day that a guy made a perfect heart shot on the deer,he was using a lighter arrow but he was also using a Rocket miniblaster.75 gr and 1 3/4" diameter cut(expandable).The broadhead also didn't have a pathfinder point.The arrow went through both sides but didn't even get close to the fletching.No way in hell should that happen from an arrow of ANY WEIGHT.If the arrow is tuned,A heart shot should go completely through.The broadhead isn't designed for penetration,it is designed for massive damage.
I see the same thing alot by others using Spitfires.They are a great quality head but penetration from average setups is not their strong suit.They should be saved for those guys that can shoot 70 - 80 ft/lb's ke(for reference guys
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I love expandables and they can be used quite effectively by even low energy setups,you just have to use common sense when choosing them for your setup.I shoot 380 gr arrows with Rocket Steelheads and have had some pretty amazing penetration,even on high angle shots.